IT Project selection is a multi-criteria decision-making (MCDM) problem. The key process of IT project selection is the assessment criteria framework establishment and criteria weight evaluation. Several criteria should be included into the judging system, and the complexity of multi-criteria judgment could even increase if relationships among selection criteria are taken into consideration. A method named fuzzy analytic network process (FANP) is proposed to tackle with the relationships of criteria and the uncertainty of them. A network structure of criteria is developed according to ANP method first, and then fuzzy method is used to evaluate the interdependent importance between criteria. After the weight determination of relative criteria, project selection result could be clear. At the end, an example is given to explain the usage and availability of this method.